PORTLAND COMPOSITE CEMENT  CEM II 42.5  N    B-M (P-L) 

Chemical analysis	Results (%)	Limit values
Silicon Oxide, % SiO2	23,34
Aluminium Oxide, % Al2O3	6,61
Iron Oxide, % Fe2O3	3,16
Calcium Oxide, % CaO	55,86
Magnesium Oxide, % MgO	1,41
Sulphur Oxide, % SO3	2,55	≤ 3,5%
Sodium Oxide, % Na2O	0,80
Potassium Oxide, % K2O	1,25
CI	0,0160	≤ 0,10%
Loss on Ignition % ( L.O.I)	7,86
Free lime	0,87
Total Additive	26,84	21-35

Physical analysis	Results	Limit values
Initial Setting Time (minutes)	180	≥ 60
Final Setting Time (minutes)	275
Soundness/Expansion (mm)	1,0	≤ 10
Specific Surface Area Blaine (cm2/g)	4321
2 days - Compressive Strength (MPa)	18,0	≥ 10
7 days - Compressive Strength (MPa)	30,7
28 days - Compressive Strength (MPa)	45,9	≥ 42,5; ≤ 62,5